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Finding the Fourth Proportional to 819,796.80, 1,229,695.20 and 648,554.70

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Solution

The fourth proportional to 819,796.80, 1,229,695.20 and 648,554.70 is: 972,832.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,796.80 : 1,229,695.20 = 648,554.70 : x
  2. Step 2: Convert to fraction form
    819,796.80/1,229,695.20 = 648,554.70/x
  3. Step 3: Cross multiply
    819,796.80x = 1,229,695.20 × 648,554.70
  4. Step 4: Simplify right side
    819,796.80x = 797,524,601,527.44
  5. Step 5: Solve for x
    x = 797,524,601,527.44/819,796.80
  6. Step 6: Final answer
    x = 972,832.05

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.